Filter press



Patented Mar. 14, 1922.

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ALFRED BURGER, or BRo'oxLYN, yNew Yonai.

FILTER PRESS.

` Application led June 6,

panying drawings, forming a part hereof.r

In the operation of filter.presses,vsuch as are employed in theseparation of soluble substances fromy insoluble substancesl and inwhich the material to be treated is delivered in a liquid or semi-liquidcondition, Vthe main and intermediate filter plates or frames whichsupport theV filter cloths, must be pressed together' under very heavypressure in order that there shall be no leakage between the plates orframes. Commonly the pressure is applied through the medium of a screwwhich is mounted in a suitable nut. supported at one end ofthe filterpress and bears against the movable head, between whiclrand thestationaryhead of the press the several filter plates or frames aremounted. The screw is commonly rotated by levers appliedA to it and theoperation of either opening the Vfilter press, that is relieving theplates or frames of pressure and separating them to permit, the removalof filter cake, and the operation of closingthe press, that is ofpushing the plates or frames together andsubj ecting them to therequired pressure, require not only considerable time, but the servicesof several, perhaps three or four, attendants, particularlyY in theopera-V tion of filter presses of large size. `lt isvthe object of thisinvention to provide means whereby suclra filter' press can be opened orclosed with greater facility thanis now possible and whereby the entireoperation, including the applicati-on ofthe required pressure, can beaccomplished, even in filter presses of large size, by one man. Inaccordance with the invention the worm gear is fixed on the screw shaftand is operatedV by a worm which is so mounted as to be capable ofmoving with the worm gear in the direction of movement `of the screwshaft, while it is held from revolution about the screw shaft, provisionbeing also made whereby the worm can be disengaged readily from the wormgear to permit the screw shaft to be moved rapidly when pressure is notbeing applied through it to the filter plates or frames. This part ofthe invenspecification of Letters ratent.- Patentedpmr, 14, 1922 1919.serialt 10,302,091

tion will be tmore* fully .Y describedvherein;Y

after vwith reference to, the' accompanying drawings and other featuresof improve-- ment will also be pointed out.V In the drawingsv 'i Figurel is atopy view ofso much of af filter press as 1s necessary' to enablethe applieation thereto vofthe'invention to be understood, .the pressbeingy shown as partly broken @E to save space.

Figure 2 isa view of the same in side ele'- e vation. Y Y i c Figure Sisa view ofthe same iny end elevation as. seen from the right handV inFiguresfl and2j f Figure` l is la `detail view, `in section through theeasing, showing the-relation of the worm,worm gearand',eccrentricfbearings. 75

The filter press to which the invention-is applied may be constructedinpanyusual or suitable mannerv and mayseompri'se, as shown' in thedrawing,4 main fra-me members 'insup-Y ported Qupon suitablestandardsa,'a1sta tionary end plate or headb, a fixedtransverse member 0,' amovable end Vplate or head l and filter plates or frames@ whicharesupported movably on the main frame members c, as well as the movablehead (Z.V In a nutearried by thefxed transverse member c, as indicatedat c, 1s threaded the usual screw shaft f which bears at its forward endythrough a'removable spacingv block f, against the movable headd. In theopera- Y tion of closing the filter press, when all of the ltery platesor frames e have been 'set in positiony on the main frames a, with theirfilter cloths and appropriate connections, not necessary to be shownherein, the movable headd is moved up againstV the end of the seriesoffilter platesor frames, the spacing block f is setr in position,- andthey screw shaft 7 is'rotated to exert the desi-red pres- -sure againsttheV l movable 'fhead alY and through itl to press the filter platesorframes closely together. In the operation of opening'thev filter pressthe screw-shaft is backed ofi' sufficiently to'permit the spacing blockf to beremoved,'the movable head ai drawn back and the filter plates areseparated and opened. The construction and the operation thus fardescribed may be all as usual.

The screw shaft 7 has fixed thereon, in the rear of the fixed transversemember c, a worm gear g, which is engaged by a transverse worm shaft hprovided at one end of a suitable operating handle 7i. The

g rennes1 worm shaft 7i. must. be capable of moving in a longitudinaldirection with the screw Yto the screw shaft f, while at the same timethey are capable of movement with the screw shaft in the direction ofits lengt-h. Through the applic-ation of hand power to the handle it ofthe worm shaft 7L., the screw shaft f can be rotated withgreat force andthe filter plates or frames can be removed and held together under greatpressure.

In the opening of the filter press it is desirable that the screwshaft.be rotated more rapidly than is possible to the intermediary ofthe Worm shaft and Worm gear. To permit this to be accomplished the wormshaft is held in' movable bearings so that it can be disengaged from theworm gear and so leave the worm shaft free to be rotated in the usualmanner by levers applied directly thereto. As shown, the worm shaft. ismounted eccentrically in circular plates 1c which arel mounted rotatablyin the end plates i of the lower portion Yof the casing z', the plates72 being heldY in position with the Worm shaft in mesh with the wormgear by any suitable means such as a bail which engages both of theeccentrics and latch, indicated at c.- By a half rotation of thecircular plates le in which the bearings 702 for the worm shaft aremounted cccentrically, the worm shaft either *can be moved intoengagement with the worm gear for operation thereof. or can be moved outof engagement with the worm gear to permit the screw shaft to be rotatedmore rapidly by the application of levers in the usual manner.

It will be understood lthat various changes' in details of constructionand'arrangement may be made to suit dierent conditions of use and thatthe invention is not restricted to the particular construction shown,err cept as pointed out in the accompanying claims.

I claim as my invention:

l, The combination of main frames, Va

movable head mounted thereon, a non-ro-V tating nut, a ixednut-supporting member therefor, a screw shaft mounted in thenutsupporting member, engaging the non-rotating nut, a worm gear 'fixedon the screw shaft, a casing, a Worm shaft supported in the casing inengagement with the worm gear, and means to prevent revolution of thecasing and worm shaft about the screw shaft While permitting the casingand worm shaft to move with the worm gear in the direction of the screwshaft.

2. The combination of main frames, a movable head mounted thereon, anonrotating nut. fixed nut-supporting `member therefor, a screwshaftYmounted in the nutsupporting member engaging the non-rotating nut, aworm gear fixed on the screw shaft, a casing, a worm shaft supported 1nthe casing in engagement with the worinr gear, and guides fixed to themain frames to support and hold the casing from reyv lution Whilepermitting movement thereof with the worm gear in the direction of thescrew shaft.,

3. The combination of mainframes, a

movable head mounted thereon, a non-ro'- tating nut, a fixednut-supporting member,

a screw shaft mounted in the nut-supporting member, engaging thenon-rotating nut, tri-vorm gear fixed on the screw shaft, a casing, aworm shaft supported'in the casing in engagement with the worm gear, amea-ns to prevent revolution of the casing and worm shaft about thescrew shaft while vcrmittinnthe casin '-and worm shaft tomove with theWorm gear in the direction of the screw shaft. the casing haringecvccntrically mounted bearings to support ALFRED BURGER.

